Ultrasonic method and device for lypolytic therapy
Inactive Publication Date: 2005-01-20
LYPOLYSIS
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[0013] The present invention is directed to making lypolytic therapy practical for treatment depth and weight/volume control as well as adipose tissue removal by using high intensity, focused ultrasound (HIFU) to selectively destroy fat cells non-invasively, i.e., without an invasive or surgical procedure. In a method according to the invention a user can change the focal point of a transducer over a wide range. Consequently, this provides the opportunity to treat fat
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However, those technologies require an invasive open surgical operation and the ultrasonic tip must have direct physical contact with the fat tissue being removed.
All the above technologies are based on localized heating effect produced at a single focal point by ultrasound waves, and they suffer from the major shortcoming of having an ultrasound transducer with a single, fixed focal point.
A common problem often associated with focused ultrasonic transducers is the inability to accurately control the depth and/or the volume of
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[0025] The present invention is a method and device which uses ultrasound wave energy for lypolytic therapy with an operational frequency range from about 1 kHz to about 50 MHz. Use of high frequency ultrasound is beneficial to treating tissue based on temperature and cavitation effects. Use of low frequency ultrasound creates mechanical-vibratory lysing, i.e., fragmentation of adipose tissue, cavitation, and temperature effects for treating tissue.
[0026] As shown in FIG. 1, the device of the present invention comprises an ultrasound transducer 2, an electrical signal generator 4, a diagnostic or image generator or monitor 6, and a camera or image transducer 8. Due to the curvature of the radiation surface 10 of transducer 2, ultrasound beams 12 are directed to a focal point 14. Camera or image transducer 8, located in the center of ultrasound therapy transducer 2, allows determination and transducer-positioning with respect to location of adipose tissue before treatment. An operat...
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Abstract
The invention relates to an ultrasound transducer for use in therapy or diagnostics. More particularly, it can be used successfully in lypolytic therapy. Said ultrasound transducer comprises different segments, which allows changing curvature radius and consequently focal distance. In this case, depth and volume in treating adipose tissue (lypolytic therapy) is controllable, which means tissue can be treated selectively. Use of the liquid bag between transducer and skin surface allows propagation of ultrasound waves to the target area. After identifying fatty tissue or lypolytic depth, ultrasound transducer must be adjusted for needed focal distance and deliver ultrasound energy for treatment
Description
FIELD OF INVENTION [0001] This invention relates to ultrasound methodology. More particularly, this invention relates to the use of a variable focal point ultrasonic transducer to lyse adipose or needless tissue by causing an effect which is cavitation- and temperature-based. BACKGROUND OF INVENTION [0002] Ultrasonic liposuction, the surgical procedure for removal of fat from storage sites in the body, has grown in popularity. Useful ultrasonic liposuction devices have made it possible to remove fatty tissue with comparative safety. See, for example, U.S. Pat. No. 4,886,491 (Parisi et al.), U.S. Pat. No. 5,823,990 (Henley), U.S. Pat. No. 5,419,761 (Narayanan), and U.S. Pat. No. 6,071,260 to (Halverson). However, those technologies require an invasive open surgical operation and the ultrasonic tip must have direct physical contact with the fat tissue being removed. [0003] Other technologies, such as are disclosed in U.S. Pat. No. 5,143,063 (Fellner), U.S. Pat. No. 6,047,215 (McClure)...
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